Could be…in my personal experience with the smaller equipment I have owned, the diesels have always outperformed a similar hp gas motor in the torque produced, i.e. my Z725KH vs. my ZD1211. The larger vehicles and equipment I have owned and used the torque isn’t even close between gas and diesel. For example my 5.7L Tundra produces around 400hp and 400’lbs torque. My 6.7L Ram produces around the same 400hp but over 1000’lbs of torque. Those numbers are pretty typical when comparing gas vs diesel motors AFAIK. Yes, my Tundra will run circles around my Ram on a race track...but can’t come close to pulling a 30k lb trailer as easily.they already do. Look at Kubota's gas engines. They ARE diesel engines, but with different internals and different cyl head. Quieter, MUCH smoother, makes more torque than the diesel counterpart in some cases. IMO convert them to high pressure DI or EFI (either one, with EFI being cheaper/easier to make and maintain) with no turbo and they'll be a serious contender. Or throw a turbo on it and your torque and horsepower potentially doubles. That in itself is not possible with current diesels. You can't take a n/a kubota diesel and toss a turbo on it and double it's output. Most, with a turbo might make 2-20hp more depending on the size of the engine.
The 1/2 ton pickup market has taken notice of the diesel engine. They built a bunch of them but they can't sell them so now they're ditching production of them and focusing on electric and gasoline. The cost to buy/own/maintain/operate a 1/2 ton diesel vs the lack of power with them is what is hurting that market. Just as I have been saying for the years that people keep saying "I want a 1/2 ton diesel". Those same "buyers" get sticker shocked. Then the few that do buy don't keep them very long and go back to gas in many cases. Those little 3.0L diesels look good on paper but they are TURDS. Nissan uses a larger 5.0L diesel but it is also a slug in comparison to a 3.5 even the little 2.7 turbo engine. My neighbor has one and I drive it somewhat often. He's losing his eyesight so I drive him occasionally to/from his lake house. 5.0L cummins. Turd. MPG isn't stellar either. The epa destroyed the diesel engine and carb has even more stringent standards coming. I believe that if carb actually goes through with it, the us epa "usually" follows suit at the federal level, and if that happens the nail will be driven into the coffin. it's already started.